Strategies used by nature to fix the red, purple and blue colours in plants: a physical chemistry approach
Nuno Basílio, Johan Mendoza, André Seco, Joana Oliveira, Víctor de Freitas, Fernando Piña
Abstract
, constituted of six anthocyanins, six flavanones and two metals. In this work we discuss how physical chemical tools are indispensable to account for the chemical behaviour of these complex systems. The experimental procedures and the equations needed to calculate all equilibrium constants of anthocyanins and the consequent pH dependent mole fraction distributions in the absence or presence of copigments are described in detail. Reverse pH jumps monitored by stopped flow have been shown to be an indispensable tool to calculate these parameters.
Topics & Concepts
ChemistryAnthocyaninIntramolecular forceBathochromic shiftBase (topology)MoleculeMole fractionIntermolecular forceStereochemistryOrganic chemistryPhysical chemistryFood scienceFluorescenceMathematicsMathematical analysisQuantum mechanicsPhysicsPhytochemicals and Antioxidant ActivitiesPlant Gene Expression AnalysisFermentation and Sensory Analysis